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MACHINE FOR DRAWING RODS 0R BARS. No. 323,761. Patented Aug. 4, 1885.

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NITED STATES PATENT OFFICE.

B. CLARK WHITE, OF CHICAGO, ILLINOIS, ASSIGNOR TO SAMUEL S. CHIS- HOLM, OF SAME PLACE.

MACHINE FOR DRAWING RODS OR BARS.

SPECIFICATION forming part of Letters Patent No. 323,761, dated August 4,1885.

Application filed August 27, 1884.

To all whom it may concern:

Be it known that I, B. CLARK WHITE, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements inDrawing-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked IO thereon, which form a part of this specification.

This invention relates to an improvement in drawingmachines for producing straight cylindrical rods or shafts; and it consists in the matters hereinafter described, and pointed out in the claims.

The invention is herein illustrated in connection with a machine for the purpose mentioned, in which the rod to be operated upon is drawn through a suitable die by means of rotary screw-shafts held in stationary bearings, and engaged with a longitudinally-movable block or carriage, to which the rod is secured such, for instance, as is illustrated in an ap- 2 5 plication,'Serial N 0. 126,367, for Letters Patent of the United States, filed in the Patent Office by WVinslow Alderdice upon the 2d day of April, 1884.

.In the accompanying drawings, which represent a machine constructed according to and embodying the present invention, Figure 1 is a plan View of the machine. Fig. 2 is a side elevation of the same. Fig. 3 is an enlarged detail section, on the line a a: of Figs. 1 and 4,

through the axis of one of the screws, sho ing the construction of the bearings thereof and of the parts adjacent thereto. Fig. 4 isa cross-section taken upon the line was of Fig. 3.

As illustratedin the drawings, A is the rectangular frame or bed of the machine, which is suitably supported upon a foundation, a. Aare two uprights or standards located at one end of the bed and at opposite sides thereof, between and by which is held a die-block,

B. (Shown in Fig. 1 and in dotted lines in Fig. 2.) G O are two heavy parallel screw-shafts, which are arranged above the side portions of the bed A, and are supported at one end in the standards A, and at their opposite ends in bearings D, secured to the bed-plate A at the end of the machine opposite to the said stand- (No model.)

ards A. E is a movable block or carriage resting and sliding on the bed A, and provided with threaded apertures for engagement with the screw-shafts O G. The said carriage 5 5 is provided with two gripping-jaws, E, for the purpose of seizing the end of the shaft or rod to be operated upon, said jaws being operated by means of handwheels E attached to the screw shafts E. A is a centrally elevated part or table resting on or supported by the bed A, and adapted to sustain the drawn part of the shaft in alignment with the die against the operation of gravity in a manner and for the purpose fully set forth in the application 6 5 of Alderdice, above referred to. The screwshafts OOare driven at equal speeds by means of pinions F, secured upon the screw-shafts, a centrally located spur wheel, F, upon the shaft F being arranged to intermesh with both of the said pinions.

The several parts above mentioned are constructed and operate substantially in a manner described in the said application of Alderdice.

The end movement or thrust of the screwshafts O C, under the strain thereon caused by drawing the metal rods through the die, is taken by anti-friction roller bearings G and G, the bearings G being located between the pinions F and the pillow-blocks D, and the bearings G between shoulders 0 upon the ends of the shafts 0 adjacent to the standards A and the inner. vertical faces of said stand ards. The roller bearings 'G G, as herein 85 shown, consist of movable rings or annular plates H, located in contact with the vertical faces of the pinions F and shoulders 0 upon the shafts, stationary rings or plates H, placed against the opposing vertical faces of the pilo low-blocks D and standards A, and rollers I, interposed between the rings, the adjacent surfaces of the rings and the rollers being of conical form, as shown.

The conical rollers I may be held in place by 5 the use of any one of the several well-known devices for this purpose-as, for instance, by annular cylindric flanges upon the outer edges of one or both of the rings H H. As herein shown, however, the outer ends of the rollers are of rounded or convex form, and separate cylindrical rings J are placed around the rollers in contact with their rounded ends, so as to hold said rollers properly in position between the rings H and H, as fully described in a patent granted to Milan C. Bullock upon the 13th day of July, 1875.

The conical surfaces of the rings H and H and of the rollers I are so arranged that they form parts of imaginary cones, the apices of which meet at a common point in the axis of the screw,'in a manner heretofore well known. The roller-bearings constructed as generally above described are well known, and are not therefore in themselves claimed as new.

The roller-bearings G,whieh are located between the pinions F and the pillow-blocks D, embody certain improved features of construction, and, as herein shown, are made as follows: Each of the shafts O is provided at its end with a suitable eylindric j ournal,c,which is fitted to the bearings or brasses D of the pillow-block,a11d which is cxtended out-wardly beyond the bearing to receive the pinion F. Upon the said cylindric part between the pinion and the bearing D, is preferably placed a sleeve, K, which is accurately fitted to the,

said journal, and within which the latter is adapted to freely revolve. The said sleeve is provided atit-s end adjacent to the pillow-block with a wide and thick flange, K, which rests against awide flange, (1, formed upon the bearing D,and in contact with which the stationary conical ring H is placed. The said ring H is closely and accurately fitted both to the exterior surface of the sleeve K and to the said flange, and is prevented from turning with the shalt by its frictional contact with the sleeve and the flange K. The sleeve is prevented from turning in a similar manner by the contact of the flange K with the bearing D.

The conical ring H, which rotates with the shaft, is fitted to bear accurately upon a plane surface, f, formed upon the hub of the pinion F, and is centered by the sleeve K, which is extended to a point adjacent to the surfacef, for the purpose of affording a bearing for the said ring. One important object of the sleeve K is to afford a broad bearing for supporting the stationary ring H concentrically upon the shaft, and to thereby prevent the shaft from being worn irregularly by the contact of the narrow edge of the said ring therewith. The said sleeve also, in connection with the flange K thereon, operates to support the ring H accurately in position with reference to the shaft and the opposing movable ring H, notwithstanding any slight inaccuracy that may exist in the bearing-faces of the flange d or the said ring.

The end of the shaft C adjacent to the stand ard A is provided with a cylindric bearingsurface or journal, a", forming the shoulder 0, before mentioned, and the end portion of said journal rests in a bearing, a, formed in the said standard. The roller-bearing G" between the standard A and the shoulder c is, as shown in the drawings, constructed without the flanged sleeve above described, the stationary conical ring H in this case being fitted accurately to the inner vertical surface of the said standard, and arranged to closely embrace the said journal 0 The ring H is fitted tightly to the said journal, and rests against and is supported by a heavy plate or washer, L, which is located upon the eylindric part a ofthe shaft, between the said ring and the shoulder c.

In order to enable the pinions F, that form the shoulder upon the shaft against which the disk H rests, to be moved longitudinally upon the shafts for the purpose of distributing the longitudinal thrust thereof equally upon the bearings G and G, as may be necessary in first adjusting the machine for op eration or on account of the expansion and contraction of the shafts by changes in temperature or for other reasons, the said pinions are loosely fitted to the cylindric parts 0 of the shafts, and held from rotation therein by splinesf, engaged with grooves in the pinions, and the ends of the shafts that proj cct beyond the pinions are threaded and provided with nuts M, adapted to bear against the hubs of the pinions, and suitable jai'nnuts, M, to hold the nuts M immovably in place. The construction above described in the connections between the pinions and shafts is shown in the application above referred to, and is not herein claimed.

It is obviously not essential to the operation of the roller thrust-bearings that they should be located adjacent to the pillow-block or other bearing that holds the shaft from lateral movement, and the said bearings may be placed between a suitable shoulder or collar upon the shaft and any stationary part of or projection upon the machineframe with the same result as herein set forth.

The use of ordinary oiled bearings to reccive the end -thrust of the screw-shafts of: drawingmachines is exceedingly obj eetionable, for the reason that the oil or other lubricant is liable to be forced out from between running surfaces thereof on account of the great pressure to which they are subjected, so as to cause heating or to cause the parts of the bearing to become unevenly worn. The maintenance of the bearing-surfaces in accurate relationship to each other and to the parts which they support is especially important in drawing-machines of the character above described, for the reason that any irregularity in the bearings is liable to throw the screwshafts out of line, or to throw more tension upon one than upon the other, and tothcreby cause an uneven strain upon the carriage, and the consequent liability of breakage or injury of the carriage or other parts of the machine. Any imperfection in the bearings causing irregularity in the action of the screw-shafts is also, for obvious reasons, liable to result in the production of crooked or otherwise imperfect rods or shafts by the machine.

I claim as my invention- 1. The combination, with a screw-shaft of a 3. The combination, with a screw-shaft of a drawing-machine, of an anti-friction rollerbearing located between a shoulder upon the shaft and a stationary part of the machine- 1 frame, and comprising two opposing disks, a series of rollers interposed between the said disks, and a sleeve, K, surrounding the shaft and provided with a flange, K, substantially as and for the purpose set forth.

In testimony that I claim the foregoing as my invention I affix my signature in presence of two witnesses.

B. CLARK WHITE.

Witnesses:

(3. CLARENCE PooLE, OLIVER E. PAGIN. 

